Materials Literature
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High-intensity light from a laser pulse can produce optical breakdown in a liquid, followed by a shock wave and the growth of a cavitation bubble. When the bubble reaches its maximum radius the liquid pressure causes it to collapse, which in turn initiates the growth of another bubble. The oscillations can repeat them…
To the Editor: Nephrogenic systemic fibrosis is a newly described systemic disorder that occurs in patients with renal insufficiency.1,2 The functional consequences of nephrogenic systemic fibrosis...
Abstract Bi 2 Te 3 doped p‐type Pb 0.13 Ge 0.87 Te samples were prepared by hot pressing. We report on very high power factor values of ∼30 μW/cm K 2 at 500 °C, as were determined from Seebeck coefficient and electrical resistivity measurements. From dilatometric characterization, the phase transition from the low tem…
A thin diffusion barrier was self-formed by annealing at an interface between a Cu-Mn alloy film and a SiO2 substrate. The growth of the barrier layer followed a logarithmic rate law, which represents field-enhanced growth mechanism in the early stage and self-limiting growth behavior in the late stage. The barrier la…
Complex silica-based microcapsules with nanopatterned features were made using Pickering stabilization as a fabrication tool. A sequential two-step liquid-liquid interface-driven assembly process was employed using Laponite clay discs and Laponite armored polystyrene latex particles as solids to stabilize emulsion dro…
Al-doped zinc oxide (AZO) films were deposited by means of remote plasma-enhanced metalorganic chemical vapor deposition from oxygen/diethylzinc/trimethylaluminum mixtures. The electrical, structural (crystallinity and morphology), and chemical properties of the deposited films were investigated using Hall, four point…
The magnetic lattice of mixed-valence Mn ions in La$_{0.7}$Sr$_{0.3}$MnO$_{3}$ is selectively diluted by partial substitution of Al or Ti for Mn. The ferromagnetic transition temperature $T_\mathrm{c}$ and the saturation magnetization $M_\mathrm{s}$ both decrease with substitution. By presenting the data in terms of s…
Dumbbell-like and rodlike nanostructures of SrSnO 3 were successfully synthesized by calcination of the corresponding hydrothermally prepared precursors, SrSn(OH) 6, at 1100 °C in air. The structure and morphology of the as-synthesized sample were characterized by X-ray diffraction, scanning electron microscopy, trans…
We perform density-functional theory calculations to investigate the adsorption of oxygen at the Au(111) surface, including on-surface, subsurface, and surface oxide formation. We find that atomic oxygen adsorbs weakly on the surface and is barely stable with respect to molecular oxygen, while pure subsurface adsorpti…
We report magnetization and magetoresistance measurements in hybrid ferromagnetic metal/semiconductor heterostructures comprised of MnAs/(Ga,Mn)As bilayers. Our measurements show that the (metallic) MnAs and (semiconducting) (Ga,Mn)As layers are exchange coupled, re- sulting in an exchange biasing of the magnetically…
We calculate the excitation energies of small neutral sodium clusters in the framework of time-dependent density-functional theory. In the presented calculations, we extract these energies from the power spectra of the dipole and quadrupole signals that result from a real-time and real-space propagation. For compariso…
We report structural, magnetization, electrical resistivity and nuclear- and electron spin resonance data of the complex transition metal oxide In_2VO_5 in which structurally well-defined V-O chains are realized. An itinerant character of the vanadium d-electrons and ferromagnetic correlations, revealed at high temper…
We derive four sum-rule expressions for spectra measured in electron energy-loss near edge structure experiments. These sum-rules permit the determination spin and orbital magnetic moments, spin-orbit interaction and number of states, analogously to the sum rules of x-ray magnetic circular dichroism. The derivation of…
We have used Monte Carlo simulations to study the effects of nanotube alignment and measurement direction on the resistivity in single-walled carbon nanotube films. These films consist of multiple layers of conductive nanotube networks with percolative transport as the dominant conduction mechanism. We find that minim…
Polarons, the combined motion of electrons in a cloth of their lattice distortions, are a key transport feature in doped manganites. To develop a profound understanding of the colossal resistance effects induced by external fields, the study of polaron correlations and the resulting collective polaron behavior, i.e.,…
A thorough theoretical study of the optical activity in planar chiral metamaterial (PCM) structures, made of both dielectric and metallic media, is conducted by the analysis of gammadion-shaped nanoparticle arrays. The general polarization properties are first analyzed from an effective-medium perspective, by analogy…
Sky-blue research: Studies of the photoluminescence and electroluminescence of a series of Ce3+ coordination complexes with tripodal benzimidazole ligands reveals effective energy transfer from both metal- and ligand-based transitions and efficient blue metal-centered emission. A blue-emitting LED device was fabricate…
Zircons can crystallize in a wide range of physical and chemical conditions. At the same time, they have high stability and durability. Therefore zircons can grow and survive in a variety of geological processes. In addition, the diffusivity of chemical compositions in their crystals is very low. Consequently,we can t…
We report the spectra of magnetically induced electric dipole absorption in ${\mathrm{Eu}}_{0.75}{\mathrm{Y}}_{0.25}\mathrm{Mn}{\mathrm{O}}_{3}$ from temperature-dependent far-infrared spectroscopy $(10--250\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}1})$. These spectra, which occur only in the $e\ensurema…
The reorientation behaviour of a smectic-A (SmA) elastomer deformed parallel to the smectic layer normal has been interpreted as a Sm-C like transition by Stenull and Lubensky. Experiments, however, prove that such a transition does not occur.